Operated by Matt Dwells this is probably the most sophisticated, advanced engine that could be in the "roll your own" family, pretty much a one man show but some major cool features and advanced options make gigablast a very cool and comprehensive search engine, I have a hard time believing you couldn't find what you are looking for there.

This engne is probably the most well known nutch powered search engine currently operating. Mozdex is in beta but who in search really isn't? Beyond promoting open source search, the operators are also looking for new ways to sell advertising to fund the expense of running a search engine, clearly they are thinking forward and also maintain a blog for further conversation.

JamBot is our attempt to make the search landscape a bit more diverse. Should there be one or two (or three) BIG dogs allowing the fate of information access to rest in the hands of the few or should there be a wide and varied information landscape available to those who have need of information? Can the search market be fragmented, are search habits hard to break? We hope to explore these evolving issues and have a little bit of fun while doing it!